Microwave permeability of single cobalt nanotube studied by micromagnetics simulations and generalized Snoek's law  

作　　者：HAN ManGui GUO Wei DENG LongJiang 

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China

出　　处：《Science China(Technological Sciences)》2014年第2期254-258,共5页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61271039);the Scientific Foundation of Young Scientists of Sichuan Province(Grant No.2012JQ0053);the Program for New Century Excellent Talents in Universities(NCET-11-0060)

摘　　要：Microwave permeability spectra of single Co nanotube under equilibrium state have been studied by micromagnetics simulation.More than four obvious resonance peaks have been found(11.72,24.20,33.18 and 39.55 GHz).Such large resonance frequency cannot be found in other traditional magnetic materials.The configurations of magnetic moments along the nanotube have been simulated.The results show that the top end of nanotube has a"flow-out"pattern of magnetic moments configuration.The bottom end has a"flow-in"pattern of magnetic moments configuration.The magnetic moments within the main body of nanotube are aligned perfectly along the length of nanotube.The magnitude of natural resonance peak is strongly related to the volume fraction of a zone,which has the same orientation of magnetic moments.Large microwave permeability values have been found for single nanotube.The generalized Snoek’s law has been used to validate the micromagnetics simulations in this paper.

关 键 词：micromagnetics simulation microwave permeability cobalt nanotube Snoek＇s law 

分 类 号：TB383.1[一般工业技术—材料科学与工程]